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Hosseini, Hoda(Departmant of Mathematics, Karaj Branch, Islamic Azad University) ; Gordji, Majid Eshaghi(Department of Mathematics, Semnan University) pp.215-231 https://doi.org/10.7468/jksmeb.2019.26.4.215
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In this paper, we establish some ĆIRIC type fixed point theorems in α-complete and orbitally T-complete non-Archimedean modular metric spaces. Meanwhile, we present an illustrative example to emphasis the realized improvements. These obtained results extend and improve certain well known results in the literature.

Kheradmand, M.R.(Department of Mathematics, Yazd University) ; Davvaz, B.(Department of Mathematics, Yazd University) pp.233-245 https://doi.org/10.7468/jksmeb.2019.26.4.233
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Cyclic hypergroups are of great importance due to their applications to many field in mathematics. In this paper, we classify all polygroups of order less than six where each of its non-identity elements is a generator.

Lee, Yang-Hi(Department of Mathematics Education, Gongju National University of Education) pp.247-254 https://doi.org/10.7468/jksmeb.2019.26.4.247
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In this paper, we investigate Hyers-Ulam-Rassias stability of the functional equation f(x + ky) - k2f(x + y) + 2(k2 - 1)f(x) - k2f(x - y) + f(x - ky) - k2(k2 - 1)(f(y) + f(-y)) = 0, where k is a fixed real number with |k| ≠ 0, 1.

Ko, Jung Mi(Department of Mathematics, Gangneung-Wonju National) ; Kim, Yong Chan(Department of Mathematics, Gangneung-Wonju National) pp.255-265 https://doi.org/10.7468/jksmeb.2019.26.4.255
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In this paper, we define the notion of (L, ∗, ⊙)-quasiuniform convergence spaces on ecl-premonoid. From (L, ∗, ⊙)-quasiuniform structures, we can obtain various (L, ∗, ⊙)-quasiuniform convergence structures and give their examples.

Lee, Yang-Hi(Department of Mathematics Education, Gongju National University of Education) pp.267-276 https://doi.org/10.7468/jksmeb.2019.26.4.267
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In this paper, we investigate the stability of an additive-cubic-quartic functional equation f(x + 2y) - 4f(x + y) + 6f(x) - 4f(x - y) + f(x - 2y) - 12f(y) - 12f(-y) = 0 by applying the fixed point theory in the sense of L. Cădariu and V. Radu.

Handa, Amrish(Department of Mathematics, Govt. P. G. Arts and Science College) pp.277-288 https://doi.org/10.7468/jksmeb.2019.26.4.277
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The main objective of this article is to establish some coincidence point theorem for g-non-decreasing mappings under contraction mapping principle on a partially ordered metric space. Furthermore, we constitute multidimensional results as a simple consequences of our unidimensional coincidence point theorem. Our results improve and generalize various known results.

Handa, Amrish(Department of Mathematics, Govt. P. G. Arts and Science College) pp.289-303 https://doi.org/10.7468/jksmeb.2019.26.4.289
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We study the existence and uniqueness of fixed point for isotone mappings of any number of arguments under Mizoguchi-Takahashi contraction on a complete metric space endowed with a partial order. As an application of our result we study the existence and uniqueness of the solution to integral equation. The results we obtain generalize, extend and unify several very recent related results in the literature.

Paokanta, Siriluk(Department of Mathematics, Research Institute for Natural Sciences, Hanyang University) ; Lee, Jung Rye(Department of Mathematics, Daejin University) pp.305-313 https://doi.org/10.7468/jksmeb.2019.26.4.305
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Using the fixed point method, we prove the Hyers-Ulam stability of 3-Lie homomorphisms and 3-Lie derivations in 3-Lie algebras for Cauchy-Jensen functional equation.

Biswas, Tanmay() pp.315-353 https://doi.org/10.7468/jksmeb.2019.26.4.315
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Orders and types of entire and meromorphic functions have been actively investigated by many authors. In the present paper, we aim at investigating some basic properties in connection with sum and product of relative (p, q)-�� order, relative (p, q)-�� type, and relative (p, q)-�� weak type of meromorphic functions with respect to entire functions where p, q are any two positive integers and �� : [0, +∞) → (0, +∞) is a non-decreasing unbounded function.

한국수학교육학회지시리즈B:순수및응용수학